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the higher-level backup probes only react when the ATO pump is on
D-D H2Ocean Refractometer is a hand held instrument for the measurement of the TRUE Salinity and Specific Gravity (S
Eheim aquarium tongs
establishing full nitrification plus nitrate and phosphate reduction in a few weeks
Includes reference for test validation
Seachem Ammonia Alert (1 Year) _tabs_Dry-stock-delivery the higher-level backup probes onlySeachem Ammonia Alert A color device that continuously detects and monitors ammonia. No test kits, chemicals or procedures needed. The device detects less than 0. 05 mg L (ppm) free ammonia and alerts you to the #1 killer before any sign of stress. Sensor changes color from yellow to green to blue relative to the ammonia concentration. Lasts over a year. For use in marine and freshwater tanks. In the absence of free ammonia the unit will assume a